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Project by kiefer posted 01-18-2015 11:31 PM 5451 views 81 times favorited 24 comments Add to Favorites Watch

This is an updated version of my box clamp that I previously posted .
The improvements are the clamping arms which enclose the strap an is also reduced to two slots which makes the strap exit on the ouside where the clamp can grab the strap and I also added a dowel to act as a hinge point to keep the arms from sliding past each other during clamping .!!

The second improvement is a strap guide which is comprised of two washers on each of the eight pins this is to centre the strap and accomplished by changing the upper and lower spacer size .

The third change is the inside corner opening enlargement which now makes it possible to clamp finger jointed and dove tail joint boxes by providing the necessary clearence .( See picture and picture #6 )

The fourth improvement is I found a way to make the strap ends the same size as the the rest of the belt and make it easy to insert into the clamp arm slots by applying a bead of CA glue about 1/2” wide and letting it dry and then trimming the end by cutting across the strap through the glued area .This gives me a nice and smooth and stiff end which is easy to insert into the slot .

All changes are made to the existing parts except for the clamping arms which I made new but could have used the existing also .

Thanks for looking


-- Kiefer

24 comments so far

View shipwright's profile


7407 posts in 2374 days

#1 posted 01-18-2015 11:46 PM

I made a set and they worked very well but I did have a few issues that detracted from the pleasure of using them.
You have cleared them all up in this update.
Mine are already altered, some alterations are my own and a couple are Klaus’s suggestions but they are now very easy to use and reliable clamps.

Thanks buddy.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees.

View Woodbridge's profile


3475 posts in 1994 days

#2 posted 01-19-2015 12:05 AM

Very nice improvements to version 1. Definitely on my to do list. Thanks for sharing this.

-- Peter, Woodbridge, Ontario

View tyvekboy's profile


1486 posts in 2589 days

#3 posted 01-19-2015 12:29 AM

Good job. Great improvements.

Thanks for sharing.

-- Tyvekboy -- Marietta, GA ………….. one can never be too organized

View CrazyAce's profile


18 posts in 808 days

#4 posted 01-19-2015 12:45 AM

Very nicely done sir!

-- -CrazyAce

View Jim Jakosh's profile

Jim Jakosh

17704 posts in 2681 days

#5 posted 01-19-2015 12:48 AM

Way to go,Klaus. I still have these on my to do list.

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View jbschutz's profile


512 posts in 2267 days

#6 posted 01-19-2015 12:48 AM

Great clamps, Klaus…...I gotta make me a set of these. Is it possible for the sides to slide by each other when you are doing butt joints?

-- jbschutz

View  woodshaver (Tony)   's profile

woodshaver (Tony)

4448 posts in 2929 days

#7 posted 01-19-2015 01:02 AM

Very nice Klaus, This will be on my to do list for sure. Thanks for sharing!

-- St Augustine FL, Experience is the sum of our mistakes!

View CharlieK's profile


475 posts in 3369 days

#8 posted 01-19-2015 01:40 AM

Hi Klaus,

A great box clamp can come in very handy. What kind of joint are you using in the last photo? It looks like a butt joint in the photo, but from your text it sounds like it is either a finger joint or a dovetail.

Thanks for sharing!

-- Adjustable Height Workbench Plans

View kiefer's profile


4991 posts in 2243 days

#9 posted 01-19-2015 01:49 AM

Thanks all for your supporting comments !
Paul thanks for your inspiration on some of the updates it always helps .

For butt joints you could add a board to the ends as a spacer with the new corner or use the original corner design . (see picture )


-- Kiefer

View kiefer's profile


4991 posts in 2243 days

#10 posted 01-19-2015 01:52 AM

Sorry for the picture but I am clamping a finger/box joint .
See comment above for butt joint .


-- Kiefer

View doubleDD's profile


5702 posts in 1619 days

#11 posted 01-19-2015 03:22 AM

I made a set similar to your first version but haven’t used them or really tested them. Side tracked on family to do projects. Thanks for the update improvements. I will hopefully get to them soon. Thanks Klaus.

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View BigFoot Products Canada's profile

BigFoot Products Canada

704 posts in 2969 days

#12 posted 01-19-2015 03:31 AM

Brilliant Idea… I am going to cut the parts out on my Laser.

View Rick M's profile

Rick M

8656 posts in 1956 days

#13 posted 01-19-2015 03:55 AM

Kiefer I think you should write a book. A woodworking publisher would be crazy not to snatch it up.


View DocSavage45's profile


7965 posts in 2418 days

#14 posted 01-19-2015 04:55 AM

Rick’s right! Everyone. “Book, Book,Book!” A lot on my to do list. One more item. I’m working on a sled.

Klaus you are Always Thinking! LOL!

-- Cau Haus Designs, Thomas J. Tieffenbacher

View Jim Rowe's profile

Jim Rowe

942 posts in 1888 days

#15 posted 01-19-2015 08:54 AM

Excellent up date. Added to “To Do” List.

-- It always looks better when it's finished!

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